Weekend game deals: 50% off TF2, Red Faction: Guerrilla

Following its recent "mann-conomy" update, Valve has cut 50% off Team Fortress 2's usual $20 asking price. Players can now purchase new hats, weapon skins, and community-made content with real money. Meanwhile, Impulse offers 50% off The Settlers 7, and if you spend $49.95 at Direct2Drive, the store will chop $10 off your next purchase. Microsoft is selling Red Faction: Guerrilla for $9.99 through Wednesday, and GOG is serving up nearly a dozen community favorites for half off.